Pulp-grading machine.



N0. 688,050. Patented Dec. 3, I90I.

L. ZEYEN R. HAAS, 1R. PULP GRADING MACHINE.

(Application led Apr. 15, 1901.)

(No Model.)

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No. 688,050. Patented Dec. 3, |90I.

L. zEYEN & n. HAAs, 1R. PULP GRADING MACHINE.

(Application filed Apr. 15, 1901.)

No'. 688,050. Patented Dec. 3, |90l.

L. ZEYEN `& R. HAAS, in. PULP GRADING MACHINE.

(Applcstion led Apr. 15, 1901.)

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Urin raras PATNT OFFICE.

LEOPOLD ZEYEN, OF RAGUHN, AND RUDOLF llAAS, JR., OF MAUEL,

GERMANY.

SPECIFICATlON forming part of Letters Patent No. 688,050, dated December 3, 1901. Application filed April l5, 1901. Serial No. 55,874. (No model.)

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Beit known that We, LEOPOLD ZEYEN, a resident of Raguhn, in the Duchy of Anhalt, and RUDOLF Hans, Jr., a resident of Manel, near Gemnd, in the Province of the Rhine, Prussia, Germany, subjects of the German Emperor, have invented a new andlmproved Pulp-Gradinglllachine,of which the following is a full, clear, and exact description.

Our invention relates to a machine'for sorting or grading paper-pulp Whileit is suspended in water by means of sieves, and has for its object to enable the grading to be elfected Without a change of sieves and in such a manner that the various grades of pulp obtained may be taken from t-he machine sim ultaneously as required. Ve arrange a series of sieves having diiferent mesh or iineness in compartments and adapt each to have alimited movement. By such arrangement We collect in each of the compartments pulp of a predetermined grade only, (according to the fineness of the sieve at the outlet end of said compartment,) and the separation of the finest grade of pulp is gradual. Thus We may take from each compartment pulp of a proper grade for each particular purpose, and the work to be performed by the finest sieves is reduced, thus minimizing the danger of clogging. The progressive separation of the line pulp also contributes to this result. The sieves may thus be kept clean readily and the efficiency of the machine is increased.

For the present needs of paper manufacturers three grades of pulp will be suflcient. The machine is therefore preferably provided with a coarse first sieve, a central sieve of medium fineness, and a tine sieve at the end, these sieves dividing the common vat or receptacle into four compartments or chambers.

It is advisable to employ a fine sieve of cylindrical shape, so as to secure a large surface and high efficiency, and preferably the pulp should pass through the sieve inward, so as to facilitate cleaning. The central sieve for the sake of simplicity will generally be plane and disposed vertically or inclined to enable it to be readily cleaned. The first or coarse sieve fulfils its office best when made troughshaped, as this construction makes it easy to remove splinters of Wood and other foreign matters with a rake. It is well to keep all the sieves in motion during the operation, so as to prevent clogging of the openings.

Reference is to be had to the accompanying drawings, which show a forni of our invention which we believe to be particularly well adapted to its purpose. y

Figure lis a longitudinal section of the machine. Fig. 2 is a plan thereof, and Fig. 3 is a cross-section through the vat and the fine sieve. Fig. 4 is cross-section illustrating the operation or movements of the several sieves.

w is a spout for feeding thepulp into the trough-shaped coarse sieve a, disposed at the inlet of the vat d and resting With one end upon a wooden supporting-bar 15, While the other end is pivotally connected at s with arms p, rigidly secured to the body of the tine sieve c, Which is cylindrically curved, its axis being horizontal. This sieve may be open at the top, as shown, and is journaled in the vat d by means of trunnions g and h, of which the latter is hollow and serves as an outlet for the fine pulp which has passed through said sieve c. Between the sieves a and c is located the intermediate or central sieve Z9, mounted to slide vertically in suitable guides and connected with the arms p by means of links q and r. This sieve divides the vat d into compartments e and f. To the sieve c are attached arms fi, provided with slots k, into Which lit crank portions l of a shaft m, journaled in bearings n of the vat d. A pulley o is provided for the reception of a driving-belt. At the bottom of the compartments e andf are outlets controlled by cocks v and u, respectively. The coarse sieve a should project above the level of the liquid, and the sieves b and c are progressively liner.

The arms z' being rigidly secured to the heads of sieve c, it is apparent they have the same center of motion or vertical oscillation as the latter, and hence as the shaft m rotates, its cranks having free play in the slots c of said arms vl, the latter and the `sieve c will be rocked or oscillated on the trunnions g h; also, that the central sieve b will be reciprocated vertically by means of the links q r, which connect it loosely with the arms z', and that the tray-like sieve a will be reciprocated horizontally as a Whole, While its larger cocks u and 0.

and inner end will be alternately raised and lowered at the same time in the arc of a circle, the wooden block t serving as the fulcrurn or center of such oscillation. The result is as follows: The pulp fed through the spout w is freed by the sieve d of all large foreign matters, which may be raked off the surface of the liquid in said sieve. The pulp which passes through the sieve ct into the first compartment e is coarse, but may be sometimes used for the manufacture of some grades of paper or for other purposes, and this grade of pulp may be withdrawnby opening the cock '0. The finer particles of pulp then pass through the intermediate sieve b into the second compartment f, and a finer grade of pulp suitable for the manufacture of paper of a better quality may be let off from said compartment by opening the cock u. Finally, the pulp passes through the sieve c, and the finest grade of pulp is thus discharged through the hollow trunnion h. In case the lower grades of pulp are not used they will accumulate at the bottom of the vat d and should be removed from time to time by opening the The continuous shaking of the sieves facilitates the passage of the pulp and prevents their clogging. The sieve b may be inclined instead of vertical, if desired; but in any case it serves to divide the vat d into two compartments.

It will be seen that the movements of the several sieves being different and in a measure opposed to each other no persistent waves or currents are set up in the liquid and the latter is not liable to be splashed out of the Vat.

Having thus described our invention, we claim as new and desire to secure by Letters Patentl. A machine for grading paper-pulp and the like, consisting of a vat and a series of sieves arranged therein, one of them dividing said vatinto compartments, and the other two being located in the respective compartments thus formed, the sieves being progressi'vely finer from the inlet to the discharge, substantially as shown and described.

2. A machine for grading paper-pulp and the like, consisting of a vat, a trough-shaped sieve arranged at the inlet of the vat, a sieve dividing the vat vertically, and another sieve located in the vat between such vertical sieve and the outlet, and all the sieves being progressively finer in mesh, as showny and described.

3. A machine for grading paper-pulp and `the like, comprising a vat, a cylindrical sieve arranged at the outlet of the vat, and a troughlike coarser sieve located between said cylindrical sieve and the inlet of the vat, the same being adapted to oscillate, substantially as shown and described.

4. A machine for grading paper-pulp and the. like, consisting of a vat, a trough-shaped sieve arranged at the inlet of the vat and adapted to rock, means for imparting a rocking motion to said sieve, and another, finer sieve located in the vat betweensaid troughshaped sieve and the outlet, and means for oscillating the same, substantially as described.

5. In a machine forgrading pulp, the combination, with a vat and a rocking sieve into which the pulp is received, of a vertically-reciprocating sieve, and means for imparting motion to said sieves, substantially as shown and described.

6. In a machine for grading pulp, the combination with a vat and a trough-like sieve arranged therein, of a vertically-reciprocating sieve dividing the vat into compartments, and means for rocking and reciprocating the sieves respectively, as shown and described.

7. In a machine for grading pulp, the combination with a vat and a trough-like sieve for receiving the pulp, of a cylindrical pivoted sieve having a finer mesh, and means for rocking it, both sieves being arranged in the vat, as shown and described.

8. In-a machine for grading pulp, the combination with the vat and pulpreceiving sieve, of a second sieve, having a finer mesh and mounted on trunnions so as to oscillate, and an arm connecting the two sieves, and means for oscillating it in a vertical plane, as shown and described.

9. In a machine for grading pulp, the combination with a vat, of a sieve dividing it vertically into compartments having separate outlets at the bottom, a pulp-receiving sieve arranged in the first compartment, and a rocking sieve arranged in the second compartment and having a pulp-outlet, the said sieves being of progressively-finer mesh, and means for imparting motion to the receiving and outlet sieves, substantially as shown and described.

l0. A machine for grading paper-pulp and the like, comprising a vat, a trough-shaped coarse sieve mounted to rock at the inlet of the vat,a cylindrically-curved inesievejournaled to turn about its axis at the outlet of the vat, a central sieve of intermediate iineness mount- IOO IIO

ed to slide in the vat between the other two 

